Chrome App deleting file automatically to create space

[Gaurav]

We are developing a Chrome App, and using unlimited storage in manifest file.

If at some stage storage space is not left on chromebook, and application  does more download/file writing then Chrome OS automatically deletes the earlier downloaded files in order to create space for new files coming in.

Do we have any configuration/permission so stop this auto deletion of files and rather show an error message to the user.